F-shaped three element dipole antenna for motor vehicles
AssigneeFord Motor Company
InventorTimothy J. Talty
Life of this patent
Estimating the term…
Abstract
A dipole antenna for use in motor vehicles is provided. The antenna comprises a primary linear element, a secondary element extending from the distal end of the primary element in a generally perpendicular manner and a tertiary element extending from the primary element intermediate to the distal end and a breakpoint in the primary element. The antenna generally represents an "F" shape and is electrically insulated from ground. Further, the antenna may be closely spaced to a ground plane portion of the vehicle to which the receiving device is grounded, thereby providing a directional antenna useful in a passive entry system.
Claims20
An F-shaped three element dipole antenna for incorporation into a portion of a motor vehicle, said dipole antenna comprising:
- a primary linear element having a proximal end and a distal end, said primary linear element being separated intermediate its proximal and distal ends at a breakpoint to define two feeding connections to said dipole antenna;
- a secondary linear element connected to the distal end of said primary linear element and extending generally perpendicular to said primary linear element;
- and
- a tertiary linear element connected to said primary linear element intermediate the distal end of said primary linear element and said breakpoint, said tertiary linear element extending generally perpendicular to said primary linear element.
A method of making an F-shaped three element dipole antenna for a motor vehicle comprising the steps of:
- providing a primary linear antenna element having a proximal end and a distal end;
- separating said primary linear antenna element intermediate its proximal and distal ends to define two feeding connections to said dipole antenna;
- connecting a secondary linear antenna element to the distal end of said primary linear element to extend generally perpendicular to said primary linear element;
- and
- connecting a tertiary linear antenna element to said primary linear antenna element intermediate the distal end of said primary linear antenna element and said two feeding connections, said tertiary linear antenna element extending generally perpendicular to said primary linear element.
An antenna system for passive entry systems in motor vehicles comprising:
- an F-shaped three element dipole antenna, said dipole antenna comprising
- a) a primary linear element having a proximal end and a distal end, said primary linear element being separated intermediate its proximal and distal ends at a breakpoint to define two feeding connections to said dipole antenna;
- b) a secondary linear element connected to the distal end of said primary linear element and extending generally perpendicular to said primary linear element;
- and
- c) a tertiary linear element connected to said primary linear element intermediate the distal end of said primary linear element and said breakpoint, said tertiary linear element extending generally perpendicular to said primary linear element;
- a receiving device for receiving radio signals inputted to said antenna.
Dependencies are inferred from the claim text.